P20BB
Reductant Heater "A" Control Circuit Low
DTC P20BB, sometimes indicated as P20BB00 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing reductant heater "a" control circuit low.
This code means that the reductant heater "A" control circuit is low. This can be caused by a number of things, including a defective heater, a wiring problem, or a problem with the controller.
To fix this problem, you'll need to diagnose and fix the underlying cause.
- P20BB: Reductant Heater A Control Circuit Low
- P20BB: Reductant Heater "A" Control Circuit Low
- P20BB: Reductant heater control A – circuit low
- P20BB 00: Reductant heater control A - circuit low
DTC Trouble Code Search
Bulletins
Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.
- 22-NA-112 - ELECTRICAL SYSTEM
CHEVROLET: This technical bulletin provides repair information to correct a customer concern of 2020 - 2022 silverado and sierra equipped with diesel engine setting dtcs P20BB or P20C3. - 22-NA-112 - ENGINE AND ENGINE COOLING
CHEVROLET: This technical bulletin provides repair information to correct a customer concern of 2020 - 2022 silverado and sierra equipped with diesel engine setting dtcs P20BB or P20C3.